I just finished a 4500 mile trip. Back east then back to Arizona
I thought it would be interesting to see what the mileage would be
using regular gas instead of 91 octane.
Here are the results 91 octane going east 27.6 mpg, always about 4-5 miles over the speed limit
Coming back on regular 27.5 mpg same route
That included my running around in the town of Salisbury,NC
A lot better than the ratings.
91 octane is recommended but car runs on regular fine. Will need to use a gas add in system cleaner
more often with regular to keep the carbon buildup down.
I always use 91 octane anyway but wanted to see what the difference would be
Last edited by Gene; 07-18-2016 at 12:33 PM.